Dr. Bourouiba, an expert in the dynamics of coughs and sneezes: "A 2020 report from #China demonstrated that #SARSCoV2 virus particles could be found **in the ventilation systems** in hospital rooms of patients with #COVID19."💥#coronavirus #COVID19 https://t.co/8CH1CXJxxq— Dr. Dena Grayson (@DrDenaGrayson) March 31, 2020